ISCATECH   Bedoukian   RussellIPM   Piezoelectric Micro-Sprayer


Home
Animal Taxa
Plant Taxa
Semiochemicals
Floral Compounds
Semiochemical Detail
Semiochemicals & Taxa
Synthesis
Control
Invasive spp.
References

Abstract

Guide

Chemtica
Biochemtech
AlphaScents
U-Chemo
BIOHOME
Print
Email to a Friend
Kindly Donate for The Pherobase

« Previous Abstract[Heart rate: relative risk and absolute risk]    Next AbstractTesting usability with 3D paper prototypes--Case Halton system »

Anaesthesia


Title:Impedance cardiography. The impact of new technology
Author(s):Critchley, L. A.
Address:Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, People's Republic of China.
Year:1998 Jul
Journal Title:Anaesthesia
Page Number:677-84
Language:eng
Volume:53
Issue:7
ISSN/ISBN:0003-2409 (Print). 0003-2409 (Linking)
Abstract:The 1990s have witnessed major advances in impedance cardiography technology. Problems existed with the methods used to calculate cardiac output. Excessive lung fluid, as often found in critically ill patients, may also invalidate measurements. The signal processing and measurement techniques used in older systems were deficient. The newer systems, of which there are at least six, incorporate novel and improved signal processing techniques. They also offer analog visual displays, personal computer interfacing, sophisticated analytical software and haemodynamic patient management systems. Evaluation of these systems is difficult because no true 'gold standard' method of cardiac output measurement exists. When compared with thermodilution techniques, limits of agreement of +/- 20-30% seem acceptable. These limits can be achieved in normal subjects but not in critically ill patients. Validation data are available for only half of the new systems. Until recently, the main application for impedance cardiography has been research but improved accuracy should lead to increased clinical usage.

 
Back to top
 
Citation: El-Sayed AM 2021. The Pherobase: Database of Pheromones and Semiochemicals. <http://www.pherobase.com>.
© 2003-2021 The Pherobase - Extensive Database of Pheromones and Semiochemicals. Ashraf M. El-Sayed.
Page created on 26-01-2021